Dome light short

When installing an aftermarket DVD/TV I connected the hot, ground and door trigger of the overhead dome light to the corresponding wires for the DVD player. This caused a short in the dome circuit. Have removed DVD wires but short still exists. Remote door locks no longer work either. Help please.

... Sorry to hear about this.
Have you checked all the fuses; to see if they are good?

I would start with checking all the fuses, the dome light bulb and burnt wires. (burnt wires will smell) If you didn't smell plastic burning while hooking up the DVD player, then you're okay. But check anyway.

If you can't solve the problems, call the Toyota service department for help. They may be nice and give you some help.

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I would be concerned that you may have wired the stereo incorrectly, causing this shorting problem. I suggest that you take it to a stereo installer to check the wiring, as if it is wired correctly the stereo should at least light up with a new fuse in there. Unless the new fuse blew straight away when you put it in. The central lock is likely to be thrown off by the fact that the interior light isn't working, as it uses this input to figure out if the doors are open or shut. Check interior light fuse condition, and get the wiring you've done checked, would be my advice.

The dome light gets 12 volt battery power at all times. The door switch, when the door is opened, allows the current to flow to ground, and completes the circuit. The door switch allows the ground to be made. Measure for 12 volts at the wiring connector, and measure for direct short at the ground wire, with the door open. The Ground wire is white with a black tracer.

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Related Questions:

It is because there is a hard short to ground. It is either the wires have a short leading to the dome light, the dome light itself has a short, or the switch that turns the domelight on has a short. I would suspect either a bad switch or bad domelight if you have not messed with any wiring.

Adjust the dome light switch by moving the switch lever to a different position. If this does not work, either the dome light switch is defective or wires inside the dome light came loose and caused a short across the switch itself.

The trigger for light is a return GROUND which goes to all the door switches and the light dome switch. so if there is a short on the holder or on the lamp return wire this willoveride the switches and the lamp will stay lit. So remove the dome light and check holder and return wire to switches for short.

Negative from the dome light to one terminal on the door jab,and the other terminal,hook to,and run to the other door jam on passengers side.The hot wire from the dome light goes to the hot side on the fuse box.A additional light switch can be installed,to turn the dome light on from inside the car,by running a ground to the switch,and from the switch to the ground side of the dome light.

The wire that runs to the dome light runs along the carpet retainer on the floor of the driver door opening. It then runs up the "B" pillar and over to the dome light.
Have you checked the bulb and the presence of voltage and ground at the dome light socket?
I would start there first before tearing anything apart and make sure all is good.
Let me know.
Regards,

Why didn't you hook into the entertainment system (radio ) ?
The one that turns on when the door opens is controlled by the BCM -body control module .You probably shorted out the transistor in side the BCM .
These lamps may be manually turned on by placing the interior lamp switch in the ON position, or by opening a door.
• The Dome Lamp
• The Rear Compartment Courtesy Lamp
• The Rear View Mirror Map Lights
The inadvertent power control circuit of the BCM supplies battery positive voltage to the dome lamp and the map lamps. When any door is opened, the door jamb switch contacts close providing a door open input to the BCM. The BCM then provides a ground to the interior lamps. The interior lamps receive a ground at G401 or G403.
If the driver inadvertently leaves any interior lamp on the BCM will turn it off after a 20 minute time-out.
The courtesy lamps will normally turn off using the theater dimming feature. The BCM provides a pulse width modulated ground to the interior lamps for the theater dimming feature. The courtesy lamps will also turn off immediately if a door lock command is received with all the doors closed, or if the ignition switch is turned to the ON position.

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Dome Lamps Inoperative
ematic Reference: Interior Lights Schematics
DEFINITION: Only the dome lamp is inoperative.
1
Did you perform the Diagnostic System Check - Vehicle?
YES - Go to Step 2
NO - Go to Diagnostic System Check - Vehicle
2
Place the instrument panel (I/P) dimmer switch in the DOME position.
Does the dome lamp illuminate?
YES - Go to Testing for Intermittent Conditions and Poor Connections
NO - Go to Step 3
3
Disconnect the dome lamp assembly.
Probe the courtesy lamp supply voltage circuit with a test lamp that is connected to a good ground.
Does the test lamp illuminate?
YES - Go to Step 4
NO - Go to Step 6
4
Connect the test lamp between the courtesy lamp supply voltage circuit and the courtesy lamp low control circuit.
Does the test lamp illuminate?
YES - Go to Step 5
NO - Go to Step 7
5
Inspect for poor connections at the harness connector of the dome lamp assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?
YES - Go to Step 9
NO - Go to Step 8
6
Repair an open, high resistance, or short to ground in the courtesy lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs .
YES - Did you complete the repair?
NO - Go to Step 9
--
7
Repair an open or high resistance in the courtesy lamp low control circuit. Refer to Circuit Testing and Wiring Repairs .
YES - Did you complete the repair?
NO - Go to Step 9
--
8
Replace the dome lamp assembly. Refer to Dome Lamp Replacement .
YES - Did you complete the replacement?
NO - Go to Step 9
--
9
Operate the system in order to verify the repair.
Did you correct the condition?
YES - System OK
NO - Go to Step 3

check wires for incorrect connection @ a short to ground if you installed an aftermarket radio its more than likely you connected the illum light wire to ground also check your dome switch & door pin switch for binding

There is no relay, you have a short in the system, I have fixed dozens of dome light problems on the Taurus and it was seldom the same problem from car to car, check the door switch wires first, remove the switch and diconnect it, if the short goes away the wiring is shorted to the door switch. I am sorry but there is never easy solutions to this kind of problem.